DVACOS REVITALIAING SHAMPOO, wet your hair thoroughly and apply a small amount of the product to your scalp and hair. Gently massage the shampoo into your scalp, working it through the length of your hair. Leave the shampoo on your hair for 2-3 minutes before rinsing it out thoroughly with water. For best results, use the shampoo in combination with Renocia Hair Revitalizing Conditioner.